Electrically-controlled elevator.



10.809360. PATENTED 0m. 29. 1901.

C. T. WESTLIN.

BLBOTRIOALLY CONTROLLED ELEVATOR. APPLIOA'HOI nun In. 2. 1001.

My f 1 M mvzmon ATTORNEY CARL THQBSTEN WESTLIN, 0F ARLINGTON, New JERSEY.

nmcraIomY-comomn ELEVATOR.

Specification of Letters Patent.

Application filed Inch 2. 1901. Burial lo. me.

.To all whom it may concern:

Be it known that I, CARL Tnons'mN Wasrnm, a subject of the King of Sweden, and a resident of the city of Arlington, in the county of Hudson and State of New Jersey, United States of America, have invented certain new and useful Improvements in Electrically- Controlled Elevators, of which the following is a specification.

My invention relates to electrically controlled elevators and its object is to overcome some of the difliculties present in elevators of this general class. Elevators of this class are often provided with door-locks through which the circuit of the controlling-switch passes whenever thedoor or doors are closed and latched, but which are arranged to automatically open the controlling-circuit and thus render it inoperative when a door thus equipped is unlatched or opened. Many such door-locks have been devised and are well known in the art; for example, see Patent No. 687,775, issued to Norton P. Otis and August Sundh December 3, 1901. My invention is especially applicable to such electrically controlled elevators as are provided with some form of electric door-locks such as that cited.

I will describe my invention in the following specification and point out the novel features thereof in claims.

The drawing filed herewith is a diagrammatic representation of certain parts of an electrically controlled elevator apparatus showing a simple wiring system connecting the various parts and showing my invention applied thereto.

In the drawing, 10, 11 and 12 designate mains from a suitable source of alternating current supply which, after passing through fuses 13 and a manually operated main-line switch 14, pass to various apparatus which I will now point out. These main conductors are represented in the drawing by heavy lines.

20 designates an electrically operated reversingswitch which comprises a magnet winding 21 and a core 22 within the winding. This core is connected with a horizontal strip 23 of insulating material upon which are mounted movable contacts 24 and 25 which are arranged to be moved up against stationary contacts 26 and 27, respectively, whenever the magnet an alternating current motor 41 which is connected with and arranged to drive a drum 42 through a worm 43 and a gear- 44 which is in mesh therewith. The main-line conductor 11 is connected to the middle terminal of the motor 41. The left hand terminal of the motor is connected by a conductor 15 with the movable contacts 25 and 34 of the reversing-switch 20 and the right-hand terminal of the motor is connected by a conductor 16 with the movable contacts 24 and35 of the reversing-switch.

50 designates an elevator-car which is connected with the drum 42 by means of a rope or cable 51 which passes over a sheave 52 mounted near the upper end of the travel of the elevator-car. 53 designates a manually operated switch in the car which comprises a lever 54 pivoted at 55, which lever is arranged to be moved onto a stationary contact 56 or another stationary contact 57.

I will now trace out some of the circuits and describe the operation of this device.

At 60 the lower end of the magnet winding or coil 21 of the reversing switch 20 is attached to the main-line conductor 12. The circuit continues through this coil 21 and through an automatic limitswitch 61 by conductor 62 to the stationary contact 56 in the car-switch 53. If the operator in a car moves the pivoted lever 54 onto this stationary contact 56 a circuit is completed thereby through the car-switch and through conductor 63, a series of door-locks 70, 70, conductor 64 through the magnet winding 0r coil 81 of a special automatic relay magnet 80, which I will more fully describe later, through a choke-coil 82 and to the main-line conductor 11 to which it is attachedat 65. The circuit thus established energizes the left-hand portion of the reversing-switch 20 and causes its movable contacts 24 and 25 to be moved up against the stationary contacts 26 and 27. This causes the main-line conductor 10'to be connected through contacts 26 and 24 and conductor 16 to the right-hand terminal of the motor 41, and at the same time causes the main-line conductor 12 to be connected through contacts 27 and 25 and conductor 15 to the left-hand terminal of motor 41. Thus the motor becomes energized and causes the drum 42 to be rotated which causes the car 50 to be moved in one direction. This movement of the hoisting mechanism and the car will continue until the operator brings the lever of the car-svfitch 53 back to its central position, or'until the automatic limit-switch 61 is opened. This automatic limit-switch is a well known device and is arranged to be actuated by the movement of the car or the hoisting mechanism to be opened whenever the car reaches the limit of its travel in one direction.

If the operator in the car moves the pivoted lever 54 onto stationary contact 67, i circuit is completedtheredoor lock i Y circuit. Th relati by from thepoint 66, where the lower end of reversinge W amount of "current 65' I which panes through these two circ 'ts will d nd mtch mvlwmll 31 a connected to tile-mainline m epe ontiieresutanceo eauakmvcircuman uproi Add (it! reug co, ug anauiomsilc the current supplyv will continue to pan through the limit-switch 67, similar to the one above described, portion may be controlled by the resistance 89.

thIWKh 9 4 68 t0 the \Monfly conflict It may also be seen that whenever the apparatus is at 70 thence, through pivoted lever 54, conductor 63, doorrest the door-locks will control the operating circuit in- 70, conductor 64, relay magnet 81, choke the nine manner as they usually do, and that if the circoil 82, to the main-line conductor 11 at 65. This cuit is broken at one of these door-locks the electrical will cause the right-hand portion of the reversin gcontrol of the elevator is made inoperative thereby.

switch to become energized and the main-line con- As soon is the controlling circuits are energized a por- 15 ductors 10 and 1 2 to be thereby connected with the tion oi the supply of current is shunted through the left-hand and right-hand motor terminals, respectively. auxiliary circuit 89 so that the current posing through The motor will thereby become energized and will rethe door-locks is materially reduced to any desired 15 tate m the opposite direction to that which it had amount. If, during the operation of the elevator itself,

rotated before. one oi these door-locks becomes opened for any cause 80 The parts above described and their operation are the relay magnet 80 will immediately become deenerwell known in the art-and I have pointed them out gized and the current supply to the car-switch through briefly merely to illustrate a simple form of elevator the auxiliary circuit 89 willtherebybe cut oil.

control to which my invention may be applied. I have shown a choke-coil 82 in series with the wind- It has been found in constructions of this kind that ingoi the relay magnet 80. This is animproved device 86 the strength of current which passes through the doorto use in conjunction with alternating current system locks is a frequent cause of trouble. Most of the under certain conditions but is not, of course, a necesdoor-locks now in use are constructed with small and sary adjunct to the carrying out of my'invention. I

25 delicate parts which operate satisfactorily so long as have illustrated my invention in conjunction with a the current which passes through them is not great, simpleiormoialternatingcurrent electrical'contiol, but

but it has been found necemary in many systems of it is, of course, applicable to any form of electric elevaelectrically controlled elevators to use a current of tor in which automatic electric door-locks are used, or considerable amount in the operating circuits and the it may be applied, as well to other than electric eleva- 80 consequence is that the contacts and conductors within tors so long as the controlling system for such elevators the door-locks are subject to disastrous sparking and depends upon the electric currentthrough autoburning. This is especially true with such systems as matic door-locks. It is a matter requiring nothing but are used in conjunction with alternating currents. mechanical skill to make the necessary modifications to In the present system I have devised ameans for reducmy invention to apply it to different forms of elevators 86 ing the current which 'pasess through the door-locks to and controlling systems.

a minimum-by a simple expedient and without in any w I l i i y mducmg the efiectiveneas 9 the controlling 1. In an electrically controlled elevator, the combination cuts or of the door-locks. or a circuit adapted to carry a controlling current, a door- In tracing outthe controlling circuits which are 22 3 g g 2 if? the I I pa 0 e C rcu W en e 001'- 0 S 'o an means 40 222326256 ih l gfizh z I t zin g izg gz ior shunting a part of said current around a door-lock.

I... man 2. In an electrically controlled elevator, the combination of a relay magnet 80 and also through a choke-coil 82. or a circuit adapted to carry a controlling current, a door- Th agn t wi di 81 th b becomes energized lock in the controlling circuit, said door-lock arranged to whnever th operating circuit is closed by a move; break the path of the circuit when the door-lock is open, an

45 ment of the cabswitch 53 a thereupon mite core auxiliary circuit around the door-lock, and automatic 11o means for holding said auxiliary circuit closed whenever a 83 and an associated contact-plate 84 until the latte! 1 currentiiows through the controlling circuit. raised 1 against three tationary contacts 85, 86 and 87 3. In an electrically controlled elevator, the combination and thereby electrically connects these three stationary a" Z a zg i sx zg i m z'zz :8: t 00 an a ores ons V9 1 r 50 Pogether- Thm mum brimming f um associated with arid door-lock, ma arranged to break' choke'coll 82 between the contacts 85 1 and, m the path oi! the circuit when the door-lock is open, and an closing a circuit directly from the main-line conductor auxiliary circuit around the door-lock, said electrorespon- 11 through a condu tor 38 w th t ti contacts 8 slve device being arranged to automatically hold the anxand 87 which are now connected t g ther, and thence 3 ;322:235? whenever l .mrmlt through the through an auxiliary circuit 89 which is (19518. Dated in 4. In an electrically controlled elevator, the combination 55 the drawing by a dotted line. This auxlllary' circuit 89 or a circuit adapted to carry a controlling current, a series i connected t th upper i l f h d -J k i or door-locks through which said circuit passes when all of cuit a i shown at 70a resistance syiaincluded in said door-locks are closed, an electroresponsive device in to r h f hi said operating circuit, an auxiliary circuit around the door- F egulate t 9 amount 0 culirent W c locks, and a resistance in the auxiliary circuit, said electromay flow through it. responsive device being arrangedto automatically hold the 60 It i id h a portion f th current supply f azxiliarty (hill-cultl clogzd whenever a current flows through t e con r0 n c rcn gz g fi z i i g i i 5. In an ele ctrically controlled elevator, the combination i con 1 e aunlmry 0! a car, a controlling-switch in the car, a circuit adapted 89 and conductor 63 to the car-switch! and 93 Portion of to carry a controlling current, said circuit being connected with the car-switch, a series of door-locks through which neid circuit pe'nnenwhen ell of nnid door-loch ere cloned, on electroreeponnive device in lid operating circuit, on nuxilinry circuit nround the door-loch, end I resistance in the nuxilinry circuit, neid electrorenponnive device being arranged to Automatically hold the euxilinry circuit cloned whenever a current ilown through the controlling circuit.

6. In on elternnting current electric elevntor, the combinntion of n circuit ndnpted to curry a controlling current, I plnrnlity oi! door-loch through which the circuit pnnnen when ell of acid door-loch ere cloned, an electrorenponnive device in said circuit, n choke-coil in nerien therewith, on

' end nhort-clrcuiting the choke-coil.

In tentimony whereoi! I hnvenigned my nnmeto thin npeciilcition in the presence of two nubncribing witnennen.

CARL THOBBTEN WESTLIN. Witnennes:

E. A. Snoxo, Bron E. Wne'ruu. 

